42. Dermacentor tricuspis (Schulze, 1933b).

Australasian: 1) Indonesia (east to Wallace’s Line); Oriental: 1) Indonesia (west to Wallace’s Line), 2) Malaysia, 3) Philippines, 4) Thailand (Hoogstraal & Wassef 1985 c, Parola et al. 2003, Durden et al. 2008, Petney et al. 2019, Apanaskevich et al. 2021, Erieenor et al. 2021).

Dermacentor tricuspis was originally named Indocentor compactus tricuspis by Schulze (1933b) and treated as a name incertae sedis in Guglielmone & Nava (2014). This name was reinstated by Apanaskevich et al. (2021) and currently refers to the species described by Wassef & Hoogstraal (1984) under the name Dermacentor atrosignatus, the former authors having found that the holotype of Dermacentor atrosignatus described by Neumann (1906) is a synonym of Dermacentor auratus. The specimens in Wassef & Hoogstraal (1984) are thus now treated as Dermacentor tricuspis by Apanaskevich et al. (2021), and studies concerning Dermacentor tricuspis also encompass prior research on Dermacentor atrosignatus carried out between 1985 and 2021, such as the works of Hoogstraal & Wassef (1985c), Parola et al. (2003), Durden et al. (2008) and Petney et al. (2019).

Ghosh et al. (2007) and others listed Dermacentor atrosignatus as an Indian tick, but its presence in India is apparently based on Rao et al. (1973). India is provisionally excluded from the range of this tick.